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WASHINGTON — House Republicans unveiled key details and the text behind their tax legislation Thursday, but not without some reservations from rank-and-file members.

“This is it. This is a very important and special moment for our country,” House Speaker Paul Ryan said at a news conference on Capitol Hill, surrounded by GOP leaders in the chamber.

“This is our chance to make sure that generations to come don’t just get by, they get ahead in this country.”

Ways and Means Committee Chairman Kevin Brady said during the news conference the tax bill “has President Trump’s full support.”

In advance of the bill’s release — which will be called the Tax Cuts and Jobs Act, according to a source in a meeting with GOP members Thursday — a source shared a summary of the plan, which would permanently lower the corporate tax rate to 20 percent and limit the home interest deduction to loans up to $500,000.

The bill would also increase the standard deduction for individuals and households, repeal the alternative minimum tax and increase the child tax credit to $1,600. The House GOP bill will also repeal the estate tax in 2024.

According to another source in the GOP meeting, Brady started his tax presentation with a quote from Ronald Reagan, the last president to sign a massive tax reform bill.

“I feel like we just played the World Series of Tax Reform and the American people won,” Brady said, quoting remarks Reagan made when signing his tax overhaul from the 1980s.

Brady is a Texas Republican whose Houston Astros won the World Series just hours before.

Members are reviewing the tax framework when the House ways and means committee releases its bill.

There are still key questions about what will be in the bill and whether the leadership can wrangle the votes they will need to deliver President Donald Trump a major legislative victory by the end of the year.

Now, the hard work begins of both selling the bill and keeping special interests at bay.

Many lobbyists on K Street and outside groups admit the GOP lawmakers have kept a tight lid on the process.

Once groups see what has been cut and what has been saved, winners and losers will be defined and the fight to preserve valuable tax breaks will begin.

Over the weekend, one group, the National Association of Home Builders, already came out against the not-even-released bill.

The legislation has also struck a nerve with a group of New Jersey and New York Republicans who are opposed to rolling back a popular local and state tax deduction known as SALT.

Brady already made a key concession when he said that he will still allow individuals to deduct their property taxes in the new bill. But that still wasn’t enough for some who wanted to see the income deduction restored as well.

“We are not there yet,” said Rep. Lee Zeldin, a Republican from New York told reporters just hours before the bill was released.

Details unveiled in advance of the bill’s release showed individuals would still be able to deduct their local and state property taxes, but only up to $10,000.

House Majority Leader Kevin McCarthy, a California Republican, notes he’s from a state with high state and local taxes and says lawmakers pushing for changes need to take a broader look at how the reform package will benefit their constituents.

“What’s happening is people are looking at this as one item instead of looking at everything we are doing, lowering the rate, doubling the standard deduction,” McCarthy said. “You’re better off with this.”

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In advance of the bill’s release, some Republicans were already criticizing the details. On Thursday, Sen. Marco Rubio tweeted that the $600 proposed child tax credit increase in the House’s tax reform plan wasn’t enough.

During a conversation with reporters last week, Rubio said a $2,000 child tax credit was necessary to provide tangible relief to middle-class families.

In 2015, Rubio, joined by Republican Sen. Mike Lee, proposed a child tax credit worth $2,500 per child.